Draft-regulating appliance for furnaces



July 15, 1930. A.' J. REED 1,770,760

DRAFT REGULATING APPLIANCE 'FOR FURNACES Filed Jan. 30, 1929 2 Sheets-Sheet 1 July 15, 1930. A. J. REED 1,770,760

DRAFT REGULATING APPLIANCE FOR FURNACES Filed Jan. 30, 1929 2 Sheets-Sheet 2 NW Ill ..12

. k Inventor! Wi n LAr fimr Jfieed,

g g 153% 93g Patented July 15, 91930 ARTHUR J. REED, 0F PHILADELPHIA, PENNSYLVANIA DRAFT-REGULATING APP LIANCE FOR FURNACES Application filed January.30, 1929. Serial No. 336,035.

My invention relates to the draft control of furnaces, more particularly of domestic furnaces, and has for its object to supply a simple, convenient and effective device for directing the air supply to support combustion in furnaces partly into the ash pit and partly into the fire box in properly regulated proportions and my invention consists in a draft directing and regulating appliance and in its combination with a furnace and a fan for supplying air.

The naturebf my improvements will be best understood as described in connection with the drawings in which it is illustrated and in which Figure 1 is a side elevation of a furnace equpped with my improved device, the draft regulating appliance being shown in section;

Figure 2 is a cross section on the line 2-2 of Fig. 1;

Figure 3 is a perspective view of my draft regulating appliance;

Figure 4 an end view thereof;

Figure 5 a similar end View showing a modification of the damper construction;

Figure 6 is a sectional elevation 'on the line 6-6 of Fig. 5 and Figure 7 is a sectional plan view through the fire box of the furnace showing a modifi cation of the appliance for introducing airinto the fire box.

A indicates the furnace; A the grate; A the ash pit; A the fire box; A and A indieating doors closing apertures leading into the ash pit and fire box. B is a fan for supplying air to support combustion in the furnace, the air being delivered through a conduit B. C is a flexible conduit section by which the conduit B is connected to the end section D of my draft regulating appliance indicated at D.

As shown. the parts D and D are formed of separate castings forming. when united. an air conduit adapted to be inserted in the furnace wall so as to project into the ash pit and having formed between them an opening adapted to receive a damper or dampers. At one side of the conduit D is formed a lateral chamber D this chamber being formed by means of an internal partition d and opening, as shown, in the direction from which the air is flowing through the con duit. The open end of this chamber D comes .practically flush with the opening formed forthe reception of the damper or dampers and the chamber opens into a conduit section D which is connected by a con duit D with the fire box of the furnace, as indicated in Figs. 1 and 2. r E, Fig. 4, indicates a sliding damper which is laterally movable in the conduit D and a portion of which, preferably chamfered off as shown at E extends over the opening of the chamber D In the modification shown in Fig. 5, two

dampers are provided, one, indicated at F,

being adapted to regulate the. draft through the conduit D and the other, indicated at F being adapted to regulate the draft into the chamber D I In the modification shown in Fig. 7, an air distributor, indicated at D, is located in the firebox and connected with the pipe or conduit D which, in Fig. 2, is shown as simply having a nozzle D opening into the fire box. v p

In operation air supplied by the fan B is delivered into the conduit and regulating device D in which it is divided, a port-ion passing into the ash pit and a portion passing into the chamber D'- and thence through the connections described into the fire box. A proper apportionment of the. air supplied at each point is provided for by the adjustment of the dampers. In practice-I make the area of the chamber D of about the proper proportion to the area of the conduit D toelfect a proper apportionment of the air delivered into the fire box and the ash pit and in such case a single damper such as indicated at E is used to simultaneously regulate the draft of both the ash pit and the fire box a necessary regulation however may be effected by utilizing two damperssuch as are indicated at F and F Having now described my invention, What I claim as new and desir'e'to secure by Letters Patent is:

1. In combination with a furnace and a fan for supplying air to the furnace, an air conduit opening into the ash pit of the furnace having a lateral branch and a chamber formed by an internal partition of the air conduit extending from the top of the air conduit and between the sides thereof in such manher as to form a divisional chamber therein opening in the direction from which a the air flows through the conduit and formed to directa definite portion of the air current into the lateral branch, and damper mechanism located in the conduit for controlling the flow of air through the main and branch conduits said branch conduit leading to the fire box of the furnace.

2. A draft control appliance for furnaces consisting of an air conduit sect ion adapted v to enter the ash pit of a furna'ce'having a lateral outwardly opening chamber formed in it by an internal partition wall of the air conduit extending from the top of the air conduit and between the sides thereof in such manner as to form a divisional chamber therein, a branch air conduit leading from said lateral chamber, and damper mechanism arranged to regulate the air flow throughthe main conduit and into the lateral chamber thereof.

ARTHUR J. REED. 

